app.py

import gradio as gr
import datetime
with gr.Blocks() as demo:
    def get_time():
        return """
            <script>
                const language = navigator.language;
                gr.Interface.updateInput("language", language);
            </script>
    """
    dt = gr.Textbox(label="Current time")
    demo.load(None, inputs=None, outputs=dt, _js="() => navigator.language")
    
demo.launch()